COT - Certified Ophthalmic Technician Visual Field Testing Questions and Answers

Question 1

A patient undergoing automated perimetry consistently presses the response button when no light stimulus is presented.
On the Humphrey Field Analyzer printout, this will be recorded as a high number of:

Accepted Answer

False positives

Answer

Fixation losses

Answer

False negatives

Answer

Pattern deviations

Question 2

Which of the following visual field defects is most characteristic of advanced, untreated glaucoma?

Accepted Answer

Arcuate scotoma progressing to a nasal step

Answer

Bitemporal hemianopia

Answer

Central scotoma

Answer

Altitudinal field loss respecting the horizontal midline

Question 3

A technician is preparing a patient for a Goldmann visual field test. Which of the following describes the stimulus presentation method used in this type of perimetry?

Accepted Answer

A moving light stimulus of a set size and intensity brought from non-seeing to seeing areas.

Answer

Static stimuli of varying brightness presented at fixed locations.

Answer

A grid of vertical bars that flicker at varying rates.

Answer

An electrical signal measurement from the retina in response to flashing lights.

Question 4

During a Humphrey visual field test, the instrument checks for fixation losses by presenting a stimulus in which location?

Accepted Answer

The patient's physiological blind spot

Answer

The foveal threshold area

Answer

A random point in the superior visual field

Answer

The least sensitive point from the previous test

Question 5

A patient with a pituitary tumor compressing the optic chiasm would most likely exhibit which type of visual field defect?

Accepted Answer

Bitemporal hemianopia

Answer

Homonymous hemianopia

Answer

Central scotoma

Answer

Unilateral vision loss

Question 6

When instructing a patient for their first automated visual field test, which of the following is a critical instruction?

Accepted Answer

"Keep looking at the central fixation light and press the button for any light you see, even if it's dim."

Answer

"Only press the button for the brightest lights you see."

Answer

"Move your eyes to look directly at each light before you press the button."

Answer

"You can take a short break and close your eyes whenever you feel tired."

A patient undergoing automated perimetry consistently presses the response button when no light stimulus is presented.On the Humphrey Field Analyzer printout, this will be recorded as a high number of:

A patient undergoing automated perimetry consistently presses the response button when no light stimulus is presented.
On the Humphrey Field Analyzer printout, this will be recorded as a high number of: